Date: Mon, 03 Sep 2001 11:15:50 +0900 From: "Qin, Li" <qinli@direct.ksp.nis.nec.co.jp> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: FreeBSD 4.3 doesn't support multicast for IPv4 by default? Message-ID: <3B92E7D6.833229B3@direct.ksp.nis.nec.co.jp> References: <200108311453.f7VErEJ57679@web.cs.ndsu.nodak.edu>
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It seems you're right: According to the message of tcpdump, the packet header of 'j 224.1.1.1 192.168.24.86' command of mtest program is 'foobar.com > 224.1.1.1: foobar.com > 224.1.1.1: igmp v2 report 224.1.1.1 [ttl 1]' and 'foobar.com > ALL-ROUTERS.MCAST.NET: foobar.com > ALL-ROUTERS.MCAST.NET: igmp leave 224.1.1.1 [ttl 1]' when executing 'q' command. It proved multicast is supported though, still cannot get the echo of ping at the multicast address, in this case, 224.1.1.1 on another machine :( mark tinguely wrote: > > FreeBSD and almost all network cards support Multicast by default. > > The only kernel changes that are required is when you want to run > a Multicast router on the machine. > > most likely you have a firewall rule that is blocking multicast from > being sent and recieved. > > if you do not have any firewall rules enabled, run tcpdump on the interface > and then start a mulitcast program (sdr, vic, vat, rat). The multicast > program will make an announcement to the network that it has joined the > group that you should see on the tcpdump. > > --mark tinguely. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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